so i just tore apart my engine cuz it over heated like literally 10+ times cuz long story short i got a bunk non oe t-stat.

so there was some heat scoring on the rotor bearings and plates, but both were not as bad as the front stat gear and needle bearing: look at the pics: http://i24.tinypic.com/xlhzqd.jpg

so wtf did i do wrong with the rebuild 4500km ago? or was it because it got overheated?

thanks

 

You let the rearmost needle/thrust bearing slip down behind the spacer during assembly (or a front cover job done in the car) and then tightened it all down. The spacer crushed the bearing, and the fragments have been floating around in the oil supply scarring up bearings, shafts, oil pumps, etc. The heat caused by metal to metal friction with no bearing caused the thrust plate to scorch and crack.

 

SOrry to hear about that man. I think Rotary Resurrection is right. You cant test your thermostat by putting it in a pot of boiling water

 

You're much less likely to have this happen if your engine is on a stand that allows you to rotate the front of the engine to an upright position when assembling the bearings/thrust washers. It also makes it easier to check the e-shaft end float.

 

so your saying the bearings were not supposed to be inside where they are now?

 

http://www.mazdatrix.com/faq/pulley.htm

 

its all so clear now

i get were i f'd up spacer pinched with needle bearing, aftermath: http://i24.tinypic.com/33di5pe.jpg

the plate on the other side has been lathed by the needle bearing

 

yeah, pretty standard mistake for first time rebuilders/front cover installers.

 

That sucks. At least now you know. Lesson learned.

 

hmm i had the front cover gasket replaced while the engine was in the car when the motor was just dropped in with no miles by a pro rotary builder, and the front cover wasnt touched after.

you think he could of made the mistake?

 

Its possible. I had a pro builder that used the teflon washer for the front cover o-ring on a car with s4 front castings, which is another retarded mistake. My theory is that someone else actually did that part, because I can't see how he would do something so stupid, maybe what happened to you as well.

 

He could have tried to do a shortcut when doing the front cover job in the car. I always remove all the front stack parts all the way down to that last spacer to check and be sure it is all in place, but some people just try to remove the front cover and slap another one back on.

 

it can even happen if you just take off the front crank bolt